Another fave of prepping blue crabs is usually to dunk them inside of a bucket of ice water for about five - 10 minutes. It puts them to slumber and anesthetizes them. We use rubber gloves to tear from the backs and it kills them instantaneously. “Hot because the devil” https://trevorbdczt.ltfblog.com/30978297/live-crabs-for-bait-near-me-an-overview